Implantação das ferrovias se relaciona diretamente a expansão da atividade cafeeira pois os trens eram utilizados para esse momento da produção de café até os portos sobre essa questão é correto afirmar que:

implantation of the railways is directly related to the expansion of the coffee activity because this trend was used for this moment in the production of coffee until the ports about question is it correct to say that :

sorry I don't know the answer but if anyone wants to answer then here is your translation

This is all you, but i can give you some topics that you could try. if it rained when you want to do something outdoors, it 'limits' that human activity. maybe you want to do an experiment that goes throughout the whole year and you have to have above freezing the entire year. this 'limits' your activity. i thought of those just off of the top of my head. something that gets to me that might be getting to you is you are thinking too hard about what to do. think simply, and if it is too simple, then bump it up just a little bit.